loi des proportions multiples meaning in English

law of multiple proportions

1808 John Dalton publishes New System of Chemical Philosophy, which contains first modern scientific description of the atomic theory, and clear description of the law of multiple proportions.
1808 John Dalton publie New System of Chemical Philosophy, qui contient la première description scientifique moderne de la théorie atomique et la description claire de la loi des proportions multiples.